By Robert Patterson · Reviewed by Robert Patterson, TDLR-licensed · Last updated Jul 23, 2026
The short answer: a like-for-like repair usually needs no permit, but a system change-out or new installation typically requires a mechanical permit in incorporated cities — and the licensed contractor should pull it, not you. In unincorporated county areas the rules are lighter, which makes the contractor's TDLR license your main protection.
When does an HVAC job need a permit?
Replacing equipment (a condenser, furnace, air handler, or full system) is generally permit-worthy work; a simple repair — a capacitor, a motor, a thermostat — generally is not. A mechanical permit triggers an inspection that confirms the install meets code.
How the rules differ across our area (AHJ)
Your Authority Having Jurisdiction (AHJ) depends on where you live. Incorporated cities like Tomball, Conroe, Magnolia, and Montgomery run their own building/permit departments; much of Pinehurst and the rural stretches of Montgomery County and Harris County are unincorporated with lighter local permitting. Because there's often no city inspector out here, the contractor's credentials and workmanship are what stand behind the job.
Who should pull the permit?
The licensed contractor. A permit pulled in the homeowner's name shifts liability to you; a reputable company pulls it under its own license. Air Comfort Solutions LLC is TDLR-licensed (License # TACLB00002186E) and handles permitting where the AHJ requires it. Related: do I need a permit to replace my AC? and the 2025 code changes.
Your next step
Planning a replacement or new installation? We'll tell you up front whether your address needs a permit and handle it. Request a quote, see our service areas, or browse the Learning Center.
This article is general information, not legal or code advice; permitting rules change and vary by jurisdiction. Always confirm current requirements with your local building department (AHJ). Last reviewed by Robert Patterson, TDLR-licensed, July 2026.